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Elastic properties of adhesive polymers. III. Adhesive polymer films under dry and wet conditions characterized by means of nanoindentation

Authors

  • Johannes Konnerth,

    Corresponding author
    1. Institute of Wood Science and Technology, Department of Material Sciences and Process Engineering, University of Natural Resources and Applied Life Sciences, Peter Jordanstrasse 82, A-1190 Vienna, Austria
    • Institute of Wood Science and Technology, Department of Material Sciences and Process Engineering, University of Natural Resources and Applied Life Sciences, Peter Jordanstrasse 82, A-1190 Vienna, Austria
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  • Frank Stöckel,

    1. Kompetenzzentrum Holz GmbH, Wood K plus, St.-Peter-Strasse 25, A-4021 Linz, Austria
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  • Ulrich Müller,

    1. Kompetenzzentrum Holz GmbH, Wood K plus, St.-Peter-Strasse 25, A-4021 Linz, Austria
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  • Wolfgang Gindl

    1. Institute of Wood Science and Technology, Department of Material Sciences and Process Engineering, University of Natural Resources and Applied Life Sciences, Peter Jordanstrasse 82, A-1190 Vienna, Austria
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Abstract

The mechanical properties of cured wood-adhesive films were tested in dry and wet states by means of nanoindentation. A fluid cell was used to monitor possible property changes as a function of changing moisture content. Under wet conditions, the elastic modulus and hardness of all tested adhesives (i.e., urea formaldehyde, melamine urea formaldehyde, phenol resorcinol formaldehyde, and one-component polyurethane) were reduced to about half of their values in the dry state. After renewed drying, all adhesives largely recovered their initial mechanical properties. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010

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